Harmonics Measurement in Computer Laboratory and Design of Passive Harmonic Filter using MATLAB

Munwar Ayaz,Muhammad Usman,Abdul Sattar,Muhammad Shahzad

doi:10.14569/ijacsa.2017.081230

Munwar Ayaz, Muhammad Usman + Show 2 more

Open Access

https://doi.org/10.14569/ijacsa.2017.081230

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Abstract

In this paper the harmonics measurement for computer loads is analyzed and passive filters are designed for mitigating those harmonics. The filters are designed to meet the IEEE standard 519-1992 which is recommended for harmonic current limits. Personal computers are non-linear loads that generate harmonics due to non-sinusoidal current present at entrance of power supply. In this work the personal computers in laboratory are taken as domestic load and harmonics generated by them cannot be ignored which are simulated using MATLAB/Simulink. The purpose is developing analytical method for the design of the passive harmonic filter that absorbs current harmonics caused by computer loads. The findings of this study would be supportive to make the source current free from harmonics thereby reducing the THD. Simulation results of proposed design method of passive filters shows attractive results for harmonic reduction with profit of upgrade of power factor. Design of passive harmonic filters by using non active power can be simple cost effective solution for systems.

Highlights

In AC power supply systems, current waveform is distorted and harmonics are created due to usage of non-linear loads that reduces the quality of power [1], [2]
Harmonics due to personal computers loads has particular attention to power quality (PQ) because personal computers are frequently concentrated in a massive group and produces harmonics [5], [6]
Numbers of nonlinear residential loads are increasing day by day; harmonics caused by these loads cannot be neglected

Summary

Introduction

In AC power supply systems, current waveform is distorted and harmonics are created due to usage of non-linear loads that reduces the quality of power [1], [2]. That causes enormous fault occurrence and monetary losses toward power supply system. Harmonics effect in AC power system is increasing day by day [3], [4]. Harmonics due to personal computers loads has particular attention to power quality (PQ) because personal computers are frequently concentrated in a massive group and produces harmonics [5], [6]

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